Microprocessor Control Unit 
Multipoint Control Unit 
Modular Concept Unit 
Mission Computer Upgrade 
Master Control Unit 
mcneilus 
Memory Control Unit 
Multi-Chip Unit 
maintenance communications unit 
Maintenance Control Unit 
Marangoni Convection Unit 
Mechanism Control Unit 
Mechanisms Control Unit 
Media Control Unit 
Media Conversion Units 
Message Control Unit 
Micro Controller Unit 
microcomputer unit 
Microcontroller Unit 
MICROPROGRAM CONTROL UNIT 
Minimum Coded Unit 
Mission Control Unit 
Mobile Communications Unit 
Multipoint Conference Unit 
Multipoint Conferencing Unit 
Multipoint Control Units 
Multipoint Controller Unit 
Machine Control Unit 
Magnetic Card Unit 
Main Control Unit